Samsung Galaxy S4
Samsung's latest Galaxy S4 phone is seen during its launch at the Radio City Music Hall in New York March 14, 2013Reuters

A new CyanogenMod Android 5.1.1 Lollipop CM12.1 series custom ROM has been released to the Samsung Galaxy S4 Mini models.

This new CM12.1 custom ROM is created by the XDA Developers forum group F4K. It is based on the latest AOSP (Android Open Source Project) 5.1.1 Lollipop and is said to boost performance, enhance battery-life and bring many customisation options enhance user-experience in the device.

We also like to remind that this CM12.1 is an experimental version and some issues are yet to be identified. So, we advise our readers go through the whole tutorial before going ahead with the installation.

Prerequisites (things to remember before installing Custom ROM)

  • This new CyanogenMod Android 5.1.1 Lollipop CM12.1 firmware has to be installed on the Samsung Galaxy S4 Mini 3G, GT-I9190, GT-I9192, and LTE variant (GT-I9195), models only; if tried on other devices, it might get bricked [To check your device model: Go to Settings >> About phone >> model number]
  • Though installing custom ROM improves the device's performance and UI experiences, it makes the company warranty void and they will no longer be liable to provide updates in future [users can restore warranty by flashing the device with stock-ROM].
  • Users also make sure that you have installed USB drivers on the PC, or else your device (Samsung Galaxy S4 Mini I9190/I9192/I9195) will not be recognized by the computer.
  • Make sure the device is rooted before going forward for custom ROM installation.
  • Installation of custom ROM requires clearing of memory in the smartphone, so make sure to back all the data by installing Clockwork Mod (CWM) Recovery/ TWRP in the smartphone.
  • Make sure your device has more than 80 percent battery, or else there is chance of smartphone getting temporarily bricked if the installation process is interrupted in the mid-way.

[Disclaimer:This procedure is very technical and should be performed by a person with sound knowledge of rooting (or manual software installation) Android devices. If the step-by-step installation process is not followed properly, there are chances of the smartphone getting bricked or being permanently irreparable. International Business Times, India Edition cannot be held responsible for any damage or claims from readers if the procedure does not yield the required results or if the smartphone is bricked. Hence, users are advised to proceed with caution.]

Downloadable files:

CM12 Custom ROM for Galaxy S4 Mini GT-I9190: HERE

CM12 Custom ROM for Galaxy S4 Mini GT-I9192: HERE

CM12.1 Custom ROM for Galaxy S4 Mini GT-I9195: HERE

Google Apps: HERE

Tutorial: Step-by-step installation Guide of CyanogenMod [Unofficial] Android 5.1.1 Lollipop CM12.1 Custom ROM on Samsung Galaxy S4 Mini models- GT-I9190, GT-19192 & GT-I9195-

Step 1: After downloading the CyanogenMod [unofficial] Android 5.1.1 Lollipop CM12.1 custom ROM files in to your PC; connect Samsung Galaxy S4 Mini to PC via USB cord.

[Note: Before plugging the phone to the computer, be sure that you have installed USB driver software, if not, click HERE (for GT-I9190) or HERE (for GT-19195) or HERE (for GT-I9192) to download the firmware]

Step 2: Then, place Android 5.1.1 Lollipop CM12.1 Custom ROM zip file into the phone's SD card memory. [Note: Users are advised to paste the .zip file in SD card root, not in any other folder.]

[Note: Before users' begin installing the custom software, be sure that the device must have rooted and has installed ClockworkMod Recovery/TWRP tool.]

Step 3: Now, turn off the device and disconnect from the PC.

Step 4: Then perform the regular Recovery Mode sortie by press holding 'Volume (up)', 'Home' and 'Power' buttons.

Step 5: After entering the RECOVERY mode, clear the phone memory, by choosing 'wipe data/factory reset'

[Note: use 'Volume' keys to navigate and 'Power' button to select options, while operating under Recovery Mode]

Step 6: Now, clear the cache memory by selecting 'wipe cache partition'

Step 7: Then to go back to ClockworkMod recovery, and select 'advanced' and tap 'wipe dalvik cache' [Note: This step is optional, but many recommend this procedure so that user will not face boot loops or any other errors in the middle of custom ROM installation]

Step 8: Again come back to main recovery screen and then tap 'install zip from SD card'

Step 9: Then tap 'choose zip from sdcard' and go to Android 5.1 Lollipop ROM .zip file in SD card and enter the installation process. Repeat the same procedure again to install the Google Apps. [Note: use 'Volume' keys to navigate and 'Power' button to select options]

Step 10: Once done with the installation process, navigate to '+++++Go Back+++++' and re-start the device by opting 'reboot system now' seen in the recovery menu.

Now, your device (Samsung Galaxy S4 Mini) will take a few minutes to complete the booting process.

Users then head to Settings >> select 'About phone' to confirm the installation of CyanogenMod [unofficial] Android 5.1.1 Lollipop CM12.1 custom ROM.

[Credits: XDA Developers Forum members- F4k, CyanogenMod, AICP Team, EuphoriaOS Team, Slim Team]

[Note: If faced with any issues, please leave your feedback, HERE]